Westside Energy charges its electric customers a base rate of $8.00 per month, plus 12¢ per kilowatt-hour (kWh) for the first 300 kWh used and 4¢ per kWh for all usage over 300 kWh. Suppose a customer uses x kWh of electricity in one month. Express the monthly cost E as a piecewise defined function of x. (Assume E is measured in dollars.)
Answers
The linear function that gives the monthly cost E for x > 300 is given by:
E(x) = 44 + 0.04x.
What is a linear function?A linear function is modeled by:
y = mx + b
In which:
m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.When x > 300, we have that:
The base rate of $8.00 was paid.The 12 cents for each kWh up to 300 was paid.Hence the intercept is given by:
b = 8 + 0.12 x 300 = 44.
The slope is the cost per kWh of 4 cents, hence the function is:
E(x) = 44 + 0.04x.
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Related Questions
22. a. In 1990, Nadezhda Ryashkina set the record for the 10,000 m race-walking event. She finished this race in 41 minutes 56.23 seconds. What was Ryashkina's average walking rate, in meters per second?
Answers
Given the distance covered and the time elapsed, Ryashkina's average walking rate is approximately 3.97 meters per second.
What was Ryashkina's average walking rate?Rate or speed is expressed as distance walked or traveled per unit time.
R = s/t
Given the data in the question;
Distance covered s = 10,000mTime elapsed t = 41 minutes 56.23 secondsRate r = ?First convert 41 minutes to seconds.
⇒ 41min = ( 41 × 60 )s = 2460sec
Now, Elapsed time t = 2460s + 56.23s = 2516.23 second
Next, we determine the rate.
R = s / t
R = 10000m / 2516.23 s
R = 3.97m/s
Given the distance covered and the time elapsed, Ryashkina's average walking rate is approximately 3.97 meters per second.
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A binomial experiment has the given number of trials and the given success probability n=2 p=0.2
Answers
The mean of binomial experiment has the given number of trials and the given success probability n=2 p=0.2 is 0.2
Bernoulli distribution may be a distinct likelihood distribution wherever the Bernoulli variate will have solely zero or one because the outcome.p is that the likelihood of success and one - p is that the likelihood of failure.The mean of a distribution is E[X] = p and also the variance, Var[X] = p(1-p).Bernoulli distribution may be a special case of statistical distribution once just one trial is conducted.It is given that probability of success is 0.2.
According to Bernoulli distribution
Mean = probability of success
= 0.2
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The complete question is given below :
A binomial experiment has the given number of trials and the given success probability n=2 p=0.2 then find mean
Oscar is building a fence and purchases three boards that each measure
2.91 meters long. How many meters of fence board did Oscar purchase?
Answers
Oscar bought 8.73 meters of fence board to build the fence.
The metric system and the International Systems of Units both use the metre (m), also spelt as meter, as the basic unit of length (SI). In the British Imperial and American Customary systems, it is equivalent to roughly 39.37 inches.
A fence is a building used to enclose a space, usually outdoors. It is often made of posts joined by boards, wire, rails, or nets.
Oscar purchases three boards that measure 2.91 meters long each to build a fence.
Let say the length of one board be x = 2.91 meters.
Then the total length of fence board Oscar purchases is:
= 3x = 3 × 2.91 meters = 8.73 meters
Hence Oscar purchased 8.73 meters of fence board.
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What fractions is in simplest form? 4/10, 15/18, 17/51, 9/21
Answers
Step-by-step explanation:
2/5
5/6
1/3
3/7
...........
simplify (3 * -8) plus (2x+5)-(4x-8)
Answers
The simplified value of the given expression is -11 - 2x.
BODMAS stands for Brackets of Division, Multiplication, Addition and Subtraction.
Here, we are given an expression as follows-
(3 * -8) + (2x+5) - (4x-8)
According to the rules of BODMAS, brackets must be solved first. Hence, we simplify the terms in brackets first as given below-
(-24) + (2x + 5) - (4x - 8)
Opening up the brackets we get-
-24 + 2x + 5 - 4x + 8
= -24 + 5 + 8 + 2x - 4x
= -24 + 13 -2x
= -11 - 2x
Thus, the simplified value of the given expression is -11 - 2x.
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Wharton, Inc., pays income taxes on capital gains (including gains on marketable securities) at a rate of 30 percent. At December 31, year 1, the company owns marketable securities that cost $180,000 but have a current market value of $220,000. b. As of December 31, year 1, what income taxes has Wharton paid on the increase in value of these investments? c. Prepare a journal entry at January 4, year 2, to record the cash sale of these investments at $220,000. d. What effect will the sale recorded in part c have on Wharton’s tax obligation for year 2?
Answers
The sale of investments at a price above cost is 102,000 units.
What are Marketable Securities?Any unrestricted financial instrument that can be bought or sold on a public stock exchange or a public bond exchange is defined as marketable security. As a result, marketable securities are either marketable equity securities or marketable debt securities. Marketable securities include stocks, bonds, preferred shares, and exchange-traded funds (ETFs). Marketable securities can also include money market instruments, futures, options, and hedge fund investments. The most important feature of marketable securities is their liquidity.To record the sale:
(Refer to the table shown below)
To document the sale of the security:
850k market price - 180k cost = 340k profit on the sale(Refer to the table shown below)
Record the income tax payable for the security gain:
Gain of 340,000 × 30% tax rate = 102,000Therefore, the sale of investments at a price above cost is 102,000 units.
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The correct question is given below:
Wharton, Inc. pays income taxes on capital gains at a rate of 30 percent. On December 31, 2015, the company owns marketable securities that cost $180,000 but have a current market value of $520,000. Record the sale of investments at a price above cost.
order from least to greatest:
-4.2 -4.6 -14.4 14.7
14.7
Submit Answer
-8.1
-8.1 -7.5
Answers
The order from least to greatest is -14.4 < -4.6 < -4.2 < 14.7
Given sequence of numbers is -4.2, -4.6, -14.4, 14.7
Negative numbers:
A negative number is a number that is less than zero which is often used to represent the magnitude of a loss. It can be written from highest to lowest in magnitude.
So the given sequence can be written from least to greatest as
-14.4 < -4.6 < -4.2 < 14.7
Therefore, The order from least to greatest is -14.4 < -4.6 < -4.2 < 14.7
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what integer would be added to 4 to result in a sum of zero
Answers
Answer:
-4
Step-by-step explanation:
4+(-4) =
4-4 =
0
A zip line steel cable is being constructed for a reality television competition show. The high end of the zip line is attached to the top of a 50-foot pole, while the lower end is anchored at ground level to a stake 50 feet from the base of the pole. (See figure.) Find exact values for all your answers below.
Answers
Answer:
find the value of 8x³-y³
Can you explain this to me?
Answers
1. Rewrite Divide
2. Rewrite Simplify
3. Rewrite Simplify Expressions
4. Simplify Fractions
5. and Solve
Question is in the picture attached. Thank you kindly
Answers
Answer: C, B, D, A
Step-by-step explanation:
[tex]\ln(xy)=\ln x+\ln y\\\\\ln(x/y)=\ln x-\ln y\\\\\frac{\ln y}{\ln x}=\log_{x} y\\\\\ln (x^y)=y \ln x[/tex]
These are all standard logarithm rules.
Graph f(x)=3/2x+2
Use the line tool and select two points to graph the line.
Answers
Answer:
Pick any x coordinate to substitute for x, whatever answer you get is your Y coordinate
Step-by-step explanation:
Example
x=3
(3/2)*(3) + 2 = 6.5
So my coordinates end up being (3,6.5)
Use the fact that 1 kilometer = 0.62 miles to convert 3,070 meters to miles.
Round to the nearest hundredth
Answers
Answer: 1.90 miles
Step-by-step explanation:
The conversion rate for meters to kilometers is 1 meter for 0.001 kilometers. Using this rate you can do, [tex]3070m*\frac{0.001km}{1m}[/tex]. The m units cancel and you're left with 3.07km. Since we are given the conversion rate of 1 kilometer = 0.62 miles, we can do, [tex]3.07km*\frac{0.62mi}{1km}[/tex]. again the km units cancel and you're left with 1.9034 mi. Rounded to the nearest hundredth to get 1.90.
simplified fraction 8b+3b-2=6+8b+4
Answers
Answer:
b=4
Step-by-step explanation:
it works
11b-8b = 10 + 2
3b = 12
b = 12/3 = 4
Hope this helps:)
Tristan used his graduation money of $2000 to set up a savings account. He wants to determine which investment would make the most money.
Find the amount of money each investment would yield after 5 years.
How much would Tristan earn with Account A: 5.7% interest compounded monthly
Answers
The amount that Tristan would earn in 5 years is $657.30.
How much would Tristan earn?When an amount is compounded monthly, it means that both the amount invested and the interest that has already accrued increases in value every month or 12 times in a year.
The first step is to determine the future value of the investment.
The formula for calculating future value:
FV = P (1 + r)^nm
Where:
FV = Future value P = Present value R = interest rate : 5.7% / 12 = 0.475%m = number of compounding = 12N = number of years$2000 x (1.00475)^(12 x 5)
$2000 x (1.00475)^60
= $2,657.30
Amount he would earn = $2,657.30 - $2,000 = $657.30
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What is the quotient of 6.208 x 10^9 and 9.7 x 10^4 expressed in scientific notation?
Answers
It should be noted that 6.208 x 10^9 and 9.7 x 10^4 expressed in scientific notation will be 0.64 × 10^5.
How to calculate the value?It should be noted that quotient simply means that we've to divide the numbers that are given.
This will be 6.208 x 10^9 and 9.7 x 10^4 expressed in scientific notation will be:
=(6.208 × 20^9) / (9.7 ×10^4)
= 0.64 × 10^5
The value is 0.64 × 10^5.
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2,720 divided by 20 what’s the answer
Answers
Answer:
136
Step-by-step explanation:
2720 / 20 = 136
What is −10 + |−4| − |−12|?
Answers
Answer:
-18
Step-by-step explanation:
-10 + |-4| - |-12| Since there are the | |, then any negative number inside would become a positive as it will become its absolute value, which for -4, would be 4, because it is 4 spots away from the 0 on a number line and vice versa.
-10 + 4 - 12 Answering from left to right,
-10 + 4, if you would rather make it so they are both equal, you change the + to the opposite which would be - and change the 4 back to a negative because that is what it would be if you changed the equation to be subtraction instead to be easier as they would both be negatives now, so you would subtract -10 - -4 and get -6.
-6 - 12. Again, switch the - to the opposite, which is +, and then make 12 the opposite that it was before so they both share the same symbol, making it
-6 + -12, which would be -18.
In March, Mrs. Anderson's students read 2,489 pages. In April, they read 3,052 pages. What is the total
number of pages read for the two months? Enter your answer in the box.
Answers
Answer: 5541 pages
Step-by-step explanation:
2489+3052= 5541 pgs
(a) Find the slope of the line through (-6, -13) and (-10,- 29).
(b) Based on the slope, indicate whether the line through the points rises from left to right, falls from left to right, is
vertical.
Answers
Answer:
a) 2
b) left to right
Step-by-step explanation:
a) slope= (y2 -y1)/(x2-x1)
(-13-(-21))/(-6-(-10))
8/4
2
b) left to right
b) left to right
Carlos find the absolute value of -5.3 and then if I the opposite of an answer. Jason find the opposite of -5.3 and then find the absolute value of his answer. Who’s final value is greater? Explain.
Answers
The person who has a greater number will be Carlos since 5.3 is more than -5.3.
How to illustrate the information?It should be noted that Carlos find the absolute value of -5.3. This will be - (-5.3) = 5.3.
On the other hand, Jason find the opposite of -5.3 and then find the absolute value of his answer. This will still be -5.4
Therefore, the person who has a greater number will be Carlos.
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A ball was thrown off a bridge. The table relates to the height of the ball above the ground in feet to the time in seconds after it was thrown. Use the data to enter a quadratic model in vertex form and convert it to standard form. Use the model to find the height of the ball at 1.5 seconds.
Answers
The peak height reached at 144 feet, and the graph passing through points (0, 120), (1, 144), (2, 120), gives;
1. The vertex form of a quadratic equation is f(x) = a•(x - h)² + k
Where;
a = The leading coefficient
(h, k) = The coordinates of the vertex.
Let t represent the time of travel of the ball and let h represent the height.
From the given table, we have;
f(t) = a•(t - h)² + k
f(0) = 120 = a•(0 - h)² + k = a•h² + k
120 = a•h² + k
f(1) = 144 = a•(1 - h)² + k = a•(h² - 2•h + 1) + k
f(1) = a•(h² - 2•h + 1) + k
f(1) - f(0) = 144 - 120 = 24 = -((2•h - 1)•a
24 = -((2•h - 1)•a
f(2) = 120 = a•(2 - h)² + k
f(2) - f(1) = -24 = -((2•h - 3)•a
(f(1) - f(0)) - (f(2) - f(1)) = 48 = -2•a
Therefore;
a = -24
24 = -((2•h - 1)•a
24 = -((2•h - 1)×(-24)
-1 = -((2•h - 1)
2•h - 1 = 1
h = 2/2 = 1
h = 1
120 = a•(2 - h)² + k
120 = (-24)•(2 - 1)² + k
k = 120 + 24 = 144
k = 144Which gives;
The vertex form is y = -24•(x-1)² + 144
From the vertex form, we have;
y = -24•(x-1)² + 144 = -24•(x²-2•t+1) + 144
y = -24•(x²-2•tlx+1)+ 144 = -24•x²+48•x - 24 + 144
y = -24•x²+48•x + 120
y = -24•x² + 48•x - 24 + 144 = -24•x²+ 48•x + 120
y = -24•x² + 48•x + 120
The height of the ball after 1.5 seconds is
y = -24×1.5² + 48×1.5 + 120 = 138
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-2x(x-7)
wrong answers only first answer gets brainliest+100 points
Answers
The answer is -2x² + 14X
How to calculate the expression ?The first step is to open the bracket by multiplying both values in the bracket by -2x
-2x(x-7)
= -2x² + 14x
Hence the solution to the expression is -2x² + 14x
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What is the smallest prime number that divides evenly into 45?
Answers
Answer: It's 3, because 3 is a prime number and divides evenly into 45.
Step-by-step explanation:
45 / 3 = 15
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
Which of the following must be a factor of the function
Answers
Answer:
(A) (x -2)
Step-by-step explanation:
You want to know a factor of the function whose values given in the table include (x, y) = (2, 0).
Polynomial zerosA polynomial function y = p(x) will have a factor of (x-a) if and only if p(a) = 0.
The table shows y=0 for x=2, so this polynomial function will have a factor of (x -2).
__
Additional comment
The function shown in the table is ...
y = (x -2)²
so it actually has two factors that are (x -2).
You can tell this is a polynomial function of degree 2 because the 2nd differences are constant.
First differences between successive y-values: -7, -5, -3, -1, 1, 3
Second differences between successive first differences: 2, 2, 2, 2, 2.
Estimate √15 to the nearest tenth. Then locate √15 on a number line.
√15~ (Round to the nearest tenth as needed.)
Answers
Answer:
3.9 It would be between the numbers 3 and 4 on a number line, but closer to 4
Step-by-step explanation:
If you put this in your calculator hit the square root button and then the number 15, your calculator will spit out 3.87298334621 then round this to the nearest tenths place. Look at the digit 7 to decide to round up for down. This number would be closer to 3.9 than 3.8
Pablo received a gift card of $100 for a pizza restaurant .The restaurant charges $15 per pizza. Teresa received a gift card of $70 for a different pizza restaurant .the restaurant charges $10 per pizza .let X be the number of pizzas purchase. for each card write an expression for the amount of money left on the card after purchasing X pizzas.
Answers
a)Amount of money left on Pablo's card in dollars = $100 - $15x
= $(90 - 15x)
b) Amount of money left on Teresa's card in dollars= $70 - $10x
= $(70 - 10x)
c) Write an equation to show that the two cards have the same amount of money left on them [don't know how to do this part.
$100 - 15x = $70 - 10x
Let x be the number of pizzas purchased. For each card, write an expression for the amount of money left on the card after purchasing x pizzas.
For Pablo
Keith received a gift card of $100 for a pizza restaurant. The restaurant charges $15 per pizza.
x numbers of pizza costs = $15x
Hence, the amount of money left on Pablo's card after purchasing x pizzas = $100 - $15x
For Teresa,
Mary received a gift card of $70 for a different pizza restaurant. The restaurant charges $10 per pizza.
Hence, x number of pizzas cost =$10 × x
= $10x
Therefore, the amount of money left on Mary's card after she buys x pizzas =
$70 - $10x
Amount of money left on Pablo's card in dollars = __________
Amount of money left on Teresa's card in dollars=____________
Write an equation to show that the two cards have the same amount of money left on them.
To find the equation that shows that the two cards have the same amount of money =
Equation 1 = Equation 2
$100 - 15x = $70 - 10x
Collect like terms
-15x + 10x = $70 - $100
-5x = -30
x = 30/5
x = 6
Hence, anytime Pablo and Teresa buys ,6 pizzas their gift card will have the same amount of money left on them.
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Translate (in terms of x) then solve the algebraic equation: Ten is subtracted from twice some number and the result is the sum of the number and 2.
Answers
Answer:
2x-10=x+2
x = 12
Step-by-step explanation:
Let's solve your equation step-by-step.
2x−10=x+2
Step 1: Subtract x from both sides.
2x−10−x=x+2−x
x−10=2
Step 2: Add 10 to both sides.
x−10+10=2+10
x=12
whats the simplest form of b⁴ b²?
Answers
Answer: b^6
Hope this helps
Answer:
Step-by-step explanation:
Simplify ((b^4)^4) / ((b^2)^3).First lets simplify the numerator. ((b^4)^4). The notation is b to the fourth power, to the fourth power, which is multiplying sixteen b’s. That explains why we multiple the exponents, to get b^(16) for the numerator.Similarly we simplify the denominator by multiplying the exponents for ((b^2)^3) = b^6.Putting the simplified numerator and denominator together is (b^(16))/(b^6).The six b’s in the denominator cancel six b’s in the numerator for (b^(16))/(b^6) = b^(10). Final answer b^(10).Note, another way to view (b^(16))/(b^6) = (b^(16)) * (b^(-6)) then add the exponents to have the same answer (b^(10))
in a class of 25 students, 15 of them have a cat, 16 of them have a dog and 3 of them have neither
Answers
Answer: The probability that a student chosen at random has a cat and a dog is; P(cat and dog) = 9/25.
Step-by-step explanation:
According to the question, the total number of students is; 25.
15 of them have a cat
16 of them have a dog
while, 3 of them have neither
The information above are drawn in a Venn diagram in the attached image.
where, x = number if students who own a cat and a dog.
Consequently, the total number of students who own a cat, a dog, both or neither is as follows;
15-x + x + 16-x + 3 = 25.
-x = 25 - 34
In essence, x = 9
Therefore, the number of students who own a cat and a dog is 9.
The probability that a student chosen at random has a cat and a dog is therefore;
P(cat and dog) = 9/25.